This recipe makes a lovely, chewy challah. I used my KA mixer and did have to add quite a bit more than 4 cups of flour (I used bread flour and it was a very humid day, so not sure what made that difference.) However, it turned out very nicely and was delicious! My rising time was also greatly reduced (about 45 minutes, as opposed to the 2 hours ,recommended. I did delay cutting into it for the full hour, and had never heard of this before; what a difference! Loved it...thanks for posting, blucoat!